On Fri, Sep 02, 2016 at 08:20:35PM +0200, Stefan Wahren wrote:
> Hi Peter,
>
> > Stefan Wahren <stefan.wahren@xxxxxxxx> hat am 25. August 2016 um 19:17
> > geschrieben:
> >
> >
> > Hi,
> >
> > > Peter Chen <hzpeterchen@xxxxxxxxx> hat am 25. August 2016 um 11:16
> > > geschrieben:
> > >
> > >
> > > On Thu, Aug 25, 2016 at 08:27:03AM +0200, Stefan Wahren wrote:
> > > > Am 25.08.2016 um 08:44 schrieb Peter Chen:
> > > > > On Thu, Aug 25, 2016 at 07:06:12AM +0200, Stefan Wahren wrote:
> > > > >> Hi Alan,
> > > > >>
> > > > >> i tried the following patch:
> > > > >> --- a/drivers/usb/chipidea/host.c
> > > > >> +++ b/drivers/usb/chipidea/host.c
> > > > >> @@ -185,6 +185,8 @@ static void host_stop(struct ci_hdrc *ci)
> > > > >>
> > > > >> if (hcd) {
> > > > >> usb_remove_hcd(hcd);
> > > > >> + ci_role_stop(ci);
> > > > >> + synchronize_irq(ci->irq);
> > > > > Would you please just add below line to see if this problem can be
> > > > > fixed?
> > > > > + ci->role = CI_ROLE_END;
> > > > >
> > > > > When ci->role is CI_ROLE_END, neither host nor device interrupt handler
> > > > > will run.
> > > >
> > > > I would add this before synchronize_irq() as Alan suggested.
> >
> > i replaced my ci_role_stop(ci) with ci->role = CI_ROLE_END and the panic
> > disappear:
> >
> > [ 114.980000] ci_hdrc ci_hdrc.0: remove, state 1
> > [ 114.990000] usb usb1: USB disconnect, device number 1
> > [ 115.000000] usb 1-1: USB disconnect, device number 2
> > [ 115.000000] usb 1-1.1: USB disconnect, device number 3
> > [ 115.030000] smsc95xx 1-1.1:1.0 eth0: unregister 'smsc95xx'
> > usb-ci_hdrc.0-1.1,
> > smsc95xx USB 2.0 Ethernet
> > [ 115.220000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered
> > [ 115.230000] otgsc:0x4e20, usbsts:0x0
> > [ 115.240000] reboot: System halted
>
> do you need more information?
>
I would like to know which interrupt is triggered at that time?
--
Best Regards,
Peter Chen
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